LM2574-12BN

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Input Voltage Range: 4.5V to 40V - Output Voltage: 12V - Output Current: Up to 0.5A - Efficiency: Up to 90% - Switching Frequency: 52kHz - Operating Temperature Range: -40°C to +125°C

Package: DIP-8 (Dual In-Line Package, 8 pins)

Essence: The LM2574-12BN is a step-down voltage regulator IC that provides a regulated output voltage of 12V from an input voltage range of 4.5V to 40V.

Packaging/Quantity: The LM2574-12BN is typically available in tubes or reels, with a quantity of 50 units per tube/reel.

Specifications

The LM2574-12BN has the following specifications:

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 0.5A
• Switching Frequency: 52kHz
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2574-12BN has a DIP-8 package with the following pin configuration:

____ VIN |1 8| VOUT GND |2 7| FB GND |3 6| NC GND |4 5| SW ----

• VIN: Input Voltage
• GND: Ground
• VOUT: Output Voltage
• FB: Feedback Pin
• NC: No Connection
• SW: Switching Pin

Functional Features

The LM2574-12BN offers the following functional features:

1. Step-down voltage regulation: It efficiently converts a higher input voltage to a regulated 12V output.
2. Wide input voltage range: It can accept input voltages ranging from 4.5V to 40V, making it suitable for various applications.
3. High efficiency: With an efficiency of up to 90%, it minimizes power losses and maximizes energy conversion.
4. Overcurrent protection: It incorporates overcurrent protection to safeguard the circuit and connected components.
5. Thermal shutdown: In case of excessive temperature, the IC automatically shuts down to prevent damage.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications. - High efficiency reduces power dissipation. - Compact DIP-8 package facilitates easy integration into circuits. - Overcurrent protection enhances system reliability. - Thermal shutdown prevents overheating.

Disadvantages: - Limited output current capability (up to 0.5A). - Requires external components for proper operation. - Switching frequency may introduce noise in sensitive applications.

Working Principles

The LM2574-12BN operates as a step-down voltage regulator using a switching converter topology. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal oscillator generates a fixed frequency signal that controls the switching of the internal power MOSFET. This switching action, along with the inductor and capacitor, converts the input voltage to a regulated 12V output.

Detailed Application Field Plans

The LM2574-12BN finds applications in various fields, including:

1. Power supply modules: It can be used to provide a stable 12V output for powering microcontrollers, sensors, and other electronic components.
2. Automotive electronics: It is suitable for automotive applications where a regulated 12V supply is required, such as in-car entertainment systems or lighting modules.
3. Industrial automation: The LM2574-12BN can be utilized in industrial control systems, motor drives, and other automation equipment that require a reliable power source.
4. Battery-powered devices: It can be employed in portable devices, such as battery chargers or handheld instruments, to regulate the voltage from a battery source.

Detailed and Complete Alternative Models

Some alternative models to the LM2574-12BN include:

1. LM2574-ADJ: Adjustable output voltage version of the LM2574 series.
2. LM2596-12: Similar step-down voltage regulator with a fixed 12V output.
3. LM317: Linear voltage regulator capable of providing adjustable output voltages.

These alternative models offer similar functionality and can be considered based on specific application requirements.

Word count: 558 words